Toro 51643 Service Manual page 66

Gearbox Installation On Drive Tube (cont'd)
3.
Install the
two
portions
of
the shield as shown in
Figure 130. Secure with the four machine screws
and nylon
lock
nuts.
4. On units with serial numbers 6000001 and up,
place the grass wrap shield around the drive shaft.
See Figure 130.
5.
Secure the shield (and grass wrap shield on sertain
units) to the gearbox with the three Phillips head
machine screws.
6.
Tighten the two clamping screws on the shield
bracket.
8.
Install the dust cap on the gearbox drive shaft.
9. Mount the cutter implement on the drive
shaft
and
tighten by inserting a flat bladed screwdriver into
the slot in the top of the shield and turning the
cutter implement counterclockwise.
Gearbox Seal Removal
A seal is used in the lower portion of the gearbox to keep
contaminants from entering as well as to retain grease
within the gearbox.
1. Remove the cutter implement by inserting a flat
bladed screwdriver into the hole in the top of the
shield, then rotating the cutter implement
clockwise (as viewed from the bottom of the
trimmer). See Figure 131.
SCREWDRIVER
Figure 131
CAUTION: Whenever removing
a brush or saw blade from the
trimmer, grasp it with a rag a
heavy gloves to avoid
lacerations.
2.
Remove the dust cap from the drive shaft.
3 .
Remove the sleeve from the cutter head drive shaft
by grasping with a pliers and pulling straight off.
See Figure 132.
Figure
132
4.
Remove the seal.
Gearbox Seal Installation
1. Press the new seal into the gearbox with hollow
portion of the seal facing the gearbox. Use a
11/4
inch socket to press
it
in.
2. Lubricate the sleeve with grease and slide on the
splined shaft until
it
bottoms out.
3. Install the dust cap on the gearbox drive shaft.
4.
Mount the cutter implement on the drive shaft and
tighten by inserting a flat bladed screwdriver into
the slot in the top of the shield and turning the
cutter implement counterclockwise.
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